This is NOT a sundial! So far, I have been unable to contact the sculptor to get any additional information.

Update 8/10/2007 from Brad Needham: Thanks for the question about the Ketchum sundial. It's a puzzling work, and it took me quite a few Google searches to find a bit of the story: evidently a local (to the Ketchum area) sculptor submitted a sundial design to the city, and somehow the deal fell apart after the dial was made but before the sculptor finished the gnomon. So Ketchum is left with all the markers in the street intersection for the equinox, the noon summer and winter solstices, and an analemma (of some sort), but no gnomon to make it all work.